<template>
  <div class="login_container">
    <div class="login_box">
      <!-- logo -->
      <div class="avater_box">
        <img src="../../assets/logo.png" alt="" />
      </div>

      <!-- 表单信息 loginFormRef-表单的引用对象 -->
      <el-form
        class="login_form"
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-user"
            v-model.trim="loginForm.username"
          ></el-input>
        </el-form-item>

        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            prefix-icon="iconfont icon-3702mima"
            v-model.trim="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>

        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },

      // 表单验证规则
      loginFormRules: {
        // 验证用户名
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在3-10个字符', trigger: 'blur' }
        ],
        // 验证密码
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在6-15个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置登录表单
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },

    // 登录
    login() {
      // 表单预验证
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        console.log(res)
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.$message.success(res.meta.msg)

        // 将登陆成功之后的token（当前网站打开期间生效）保存到sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avater_box {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    padding: 10px;
    box-sizing: border-box;
    box-shadow: 0 0 5px #ddd;
    position: absolute;
    transform: translate(-50%, -50%);
    left: 50%;
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #ededed;
    }
  }
  .login_form {
    width: 100%;
    position: absolute;
    bottom: 0;
    padding: 0 20px;
    box-sizing: border-box;
  }
  .btns {
    display: flex;
    justify-content: flex-end;
  }
}
</style>
